Harkness looked at the girl he held so tightly, then grinned boyishly at Chet. "I've someone else to be afraid for now," he said.

His smile faded and was replaced by a look of deep concern. "I haven't told you about Schwartzmann," he said; "haven't had time. But he's poison, Chet. And he's after our ship."

"Where is the ship; where have you hidden it? Tell me—where?"

Harkness looked about him before he whispered sharply: "Our old shop—up north!"

He seemed to feel that some explanation was due Chet. "In this day it seems absurd to say such things," he added; "but this Schwartzmann is a throw-back—a conscienceless scoundrel. He would put all three of us out of the way in a minute if he could get the ship. He knows we have been to the Dark Moon—no question about that—and he wants the wealth he can imagine is there.

"We'll all plan to leave; I'll radio you later. We'll go back to the Dark Moon—" He broke off abruptly as the door opened to admit the nurse. "You'll hear from me later," he repeated; and hurried Diane Delacouer from the room.

But he returned in a moment to stand again at the door—the nurse was still in the room. "In case you feel like going for a hop," he told Chet casually, "Diane's leaving her ship here for you. You'll find it up above—private landing stage on the roof."

Chet answered promptly, "Fine; that will go good one of these days." All this for the benefit of listening ears. Yet even Chet would have been astonished to know that he would be using that ship within an hour....


He was standing at the window, and his mind was filled, not with thoughts of any complications that had developed for his friend Harkness, but only of the adventures that lay ahead of them both. The Dark Moon!—they had reached it, indeed; but they had barely scratched the surface of that world of mystery and adventure. He was wild with eagerness to return—to see again that new world, blazing brightly beneath the sun; to see the valley of fires—and he had a score to settle with the tribe of ape-men, unless Harkness had finished them off while he, himself, lay unconscious.... Yes, there seemed little doubt of that; Walt would have paid the score for all of them.... He seemed actually back in that world to which his thoughts went winging across the depths of space. The buzz of a telephone recalled him.